Effects of molybdenum and silver on iodine transport in primary circuit on severe nuclear accidents

Jarmo Kalilainen, Pekka Rantanen, Teemu Kärkelä, M. Lipponen, Ari Auvinen, Jorma Jokiniemi

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

4 Citations (Scopus)

Abstract

This experimental study was a continuation of the study conducted at VTT to investigate the effects of reactions on primary circuit surfaces to transport of gaseous and aerosol phase iodine during the hypothetical severe nuclear accident.
Cesium iodide was used as a precursor in every experiment. In the experiments it was observed that the hydrogen in the atmosphere decreased the fraction of released gaseous iodine.
As the temperature was lowered, less iodine was released, but the fraction of gaseous iodine from the overall released iodine was increased. As molybdenum trioxide was introduced to the precursor, the fraction of gaseous iodine from the overall released iodine was increased significantly.
Also, Mo decreased the transport of Cs and caused significant depositions to the reaction furnace. Addition of silver to the CsI precursor at 650 deg. C decreased the release of iodine as well as the fraction of gaseous iodine. At 400 deg. C, Ag + CsI as well as Ag + MoO3 + CsI precursor significantly increased the release of gaseous iodine, where almost no aerosol particles were released.
With B2O3 + CsI precursor it was observed that in the atmosphere without H2O, the released iodine was mostly in gaseous form
Original languageEnglish
Title of host publicationProceedings of the 2012 International Congress on Advances in Nuclear Power Plants, ICAPP 2012
PublisherAmerican Nuclear Society ANS
Pages1336-1342
ISBN (Print)978-0-89448-091-1
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
EventInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012 - Chicago, IL, United States
Duration: 24 Jun 201228 Jun 2012

Conference

ConferenceInternational Congress on Advances in Nuclear Power Plants 2012, ICAPP 2012
Abbreviated titleICAPP 2012
CountryUnited States
CityChicago, IL
Period24/06/1228/06/12

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  • Cite this

    Kalilainen, J., Rantanen, P., Kärkelä, T., Lipponen, M., Auvinen, A., & Jokiniemi, J. (2012). Effects of molybdenum and silver on iodine transport in primary circuit on severe nuclear accidents. In Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants, ICAPP 2012 (pp. 1336-1342). American Nuclear Society ANS.